Forging / Model : T38, T45, T51 / Bit Dia.: 64mm~127mm / Face Design: Flat, Drop center, Dome / Tooth Shape: Semi-spherical, Semi-ballistic, Conical / Skirt: Standard, Retract / Apple to: Deep drilling, mining / Packing: Foam and Carton or Wooden case, Steel tapes / Origin: China (Mainland) / Material: Carbon steel /